EFFECT OF GROWTH REGULATORS ON SUMMER TOMATO {Lycopersicon esculentum Mill.) CULTIVATION
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Date
2004-06-30
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MAHATMA PHULE KRISHI VIDYAPEETH, RAHURI-413 722, DIST. AHMEDNAGAR MAHARASHTRA STATE (INDIA)
Abstract
The investigation on "Effect of growth regulators on summer tomato (Lycopersicon esculentum, Mill) cultivation" was carried out at Tomato Improvement Scheme, Department of Horticulture, Mahatma Phule Krishi Vidyapeeth, Rahuri, during the summer 2002-03. The experiment consisted of nine treatments viz., GA3 (25 and 50 ppm), NAA (25 and 50 ppm), 4-CPA (25and 50 ppm), boron (25 and 50 ppm) and absolute control with three replications in randomized block design in cv. Dhanashree. The objective of this experiment was to study the effect of various growth substances on growth, yield and quality attributes of tomato fruit. Two sprays of growth regulators were given at 50 per cent flowering and at fruit development stage i.e. peanut stage. The observations on different growth parameters such as plant height and number of primary branches, flowering parameters such as number of days for 50 per cent flowering, number of flowers and number of fruits per cluster and fruit set percentage in initial truss, middle truss and last truss. Fruitcharacters such as equatorial and polar diameter, fruit weight, number of fruitsper plant, quality and yield characters were recorded. The studies revealed significant increase in the plant height due to foliar application of Gibberellic acid. Maximum number of flowers per clusterwere recorded in treatment of GA3 application. Number of fruits in initial(February-March), middle (March-April) and last (April-May) truss were significantly influenced due to application of Boron @ 25 and 50 ppm andNAA @ 25 and 50 ppm. All these treatments were at par and significantlysuperior over control. Fruit set percentage was significantly influenced due toapplication of growth regulators. Maximum yield (264.37 q/ha) was recordedin treatment where Boron was applied @ 50 ppm followed by Boron @ 25 ppm (254.28 q/ha). Regarding the effect of growth substances on fruit characters polar and equatorial diameter, fruit weight were superior, where 4-CPA @ 50 ppm was applied. However, maximum number of fruits per plant (38.86) were recorded in treatment where Boron @ 50 ppm was applied and followed by Boron @ 25ppm (38.58) and 4-CPA @ 50 ppm (33.66).
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